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Significant Accounting Policies (Stock Transactions - Stock Option Plans Narrative) (Details)
$ in Thousands
3 Months Ended 15 Months Ended
Mar. 31, 2016
USD ($)
item
shares
Mar. 31, 2015
USD ($)
shares
Mar. 31, 2016
USD ($)
shares
Dec. 31, 2015
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | shares 564,396   564,396 475,396
Description of defined contribution pension and other postretirement plans Upon separation from service after age 66, the President and CEO will be entitled to an annual benefit in the amount of $156,000 payable in fifteen annual installments subject to annual 2% increases.      
Defined benefit plans future payments $ 948   $ 948 $ 923
Defined contribution plan, maximum annual contributions per employee, percent 80.00%      
Defined contribution plan employer discretionary contribution amount $ 89 $ 76    
Deferred fees 27 21    
Interest paid on deferred fees 7 6    
Deferred compensation arrangement distributions paid $ 0 $ 0 0  
Director [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Deferred compensation arrangement guaranteed award percentage 100.00%      
Executive Management [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Deferred compensation arrangement guaranteed award percentage 100.00%      
Supplemental Executive Retirement Plan Defined Benefit [Member] | President And Chief Executive Officer [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Annual retirement benefit contributed subject to annual increase $ 156,000      
Defined benefit plans future payments $ 2,700   $ 2,700  
Discount rate used to calculate the present value of the benefit obligation 3.84%   3.84%  
Vesting percentage right 100.00%      
Number of installment payments | item 15      
Supplemental Executive Retirement Plan Defined Benefit [Member] | President And Chief Executive Officer [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Defined benefit plan, net periodic benefit cost, annual increase 2.00%      
Supplemental Executive Retirement Plan Defined Benefit [Member] | President And Chief Executive Officer [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Defined benefit plan, net periodic benefit cost, annual increase 3.00%      
Executive Incentive Retirement Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Accrued expense under the plan $ 30   $ 30  
Life insurance plan with a post retirement death benefit $ 250   250  
Life insurance plan aggregate expenses     $ 1  
Executive Incentive Retirement Plan [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Deferred compensation arrangement guaranteed award percentage 15.00%      
Executive Incentive Retirement Plan [Member] | If Bank Exceeds Benchmarks Set Forth In Annual Executive Bonus Matrix [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Deferred compensation arrangement guaranteed award percentage 7.50%      
Executive Incentive Retirement Plan [Member] | As Of Date Awarded [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage right 100.00%      
Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years      
Share-based compensation arrangement by Share-based payment Award, Options, Award Expiration Period 10 years      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | shares 1,920,529   1,920,529  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | shares 564,396   564,396  
Share-based compensation arrangement by Share-based payment Award, Options, Exercised Forfeited Or Expired Number | shares 1,252,548      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares 103,585   103,585  
Number of options exercised | shares 0 0    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 487   $ 487  
Employee service share-based compensation, compensation cost recognition weighted average period 2 years 4 months 24 days      
Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | shares 471,551   471,551  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | shares 144,850   144,850  
Employee service share-based compensation, compensation cost recognition weighted average period 2 years 10 months 24 days      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options $ 797   $ 797